Question 317016
i like using the first letter of the names as my variables
w=wife
s=son
d=daughter
w+s+d=9000
w=2d
s=1000+d
solve for d
{{{(2d)+(1000+d)+d=9000}}}
{{{4d+1000=9000}}}
{{{4d=8000}}}
{{{d=2000}}}
<p>
{{{w=2d}}}
{{{w=4000}}}
<p>
{{{s=1000+d}}}
{{{s=3000}}}
<p>
as far as the second part i cant see the selection of equations that u can